SD. The original Hausken suppressor has been updated. Still robust and effective. SD MagnumFF150 black Suppressor Diameter Rear chamber Total length Weight Effect SD228 50 mm 88 mm 228 mm 340 g 31+ dB SD228, the original HAUSKEN suppressor, has been updated with JAKT profile pipes. Comes with threads in the front that make it possible to use the FF160 extension. SD MagnumFF150 black Suppressor Diameter Rear chamber Total length Weight Effect FF150 50 mm 0 mm 150 mm 280 g 5-10 dB 5-10 dB+ when mounting on SD228